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Metaphase i

metaphase i

(Science: cell biology) The stage in the first meiotic division of meiosis that follows prophase I. Homologous chromosomes pair with each other to form tetrads of four chromatids and they align themselves along a single plane in the centre of the cell. Homologous recombination generally occurs during this stage. This stage ends as soon as the homologous chromosomes start being pulled away from each other, to opposite ends of the cell.


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Re: cell division

... in its entirety it is not cell division. You could go into specifics with your answer and explain the phases. Prophase, interphase, anaphase, metaphase, etc. Do not say that the cell cycle is cell division though. The cell cycle begins with the birth of a cell and ends with its death, it covers ...

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by bioantDrJ
Mon Oct 19, 2009 5:16 am
 
Forum: Cell Biology
Topic: cell division
Replies: 4
Views: 57

cell cycle feedback control

im looking at the cell cycle. I know there are 3 check points -- one between G1 and s, another before G2 and one during metaphase. My lecture notes say that cell cycle control involves both checkpoints and feedback control. I read on the internet that feedback control detects the failure ...

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by sarah90222
Sun Oct 11, 2009 6:43 pm
 
Forum: Cell Biology
Topic: cell cycle feedback control
Replies: 2
Views: 70

Following the number of chromosomes through Mitosis

... in the G2 phase, as chromatin connected by cohesins. Then, in prophase, the chromatin condenses into chromosomes, in this case 6. Go through Prometaphase and metaphase with no change in the number of chromosomes. Then, in anaphase, after the homologous chromosomes(1 chromosome=2 sister chromatids) ...

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by cctennisfan
Thu Oct 01, 2009 10:37 pm
 
Forum: Cell Biology
Topic: Following the number of chromosomes through Mitosis
Replies: 2
Views: 304

How does Head To Head Telomere Fusion express itself?

... DNA into chromosomes begins. I don't know what proteins are found to help support a fusing of chromosomes, and then to hold them together during metaphase. It would have to be an intricate orchestrated process that would unfold into a viable offspring. (Though telomeres do have unique proteins ...

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by kolean
Fri Aug 28, 2009 10:34 pm
 
Forum: Cell Biology
Topic: How does Head To Head Telomere Fusion express itself?
Replies: 3
Views: 281

chromosome 2 replication.

you are actually correct that there would be a problem with having two centromeres though: in metaphase a microtubule from one pole could attach to one centromere and a microtubule from the other pole would attach to the other centromere, so during anaphase in this scenario ...

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by MrMistery
Wed Aug 05, 2009 1:26 am
 
Forum: Genetics
Topic: chromosome 2 replication.
Replies: 4
Views: 327
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